Nemesia is a genus of annuals, perennials and sub-shrubs which are native to Africa. A range of hybrids of species in this genus are commonly cultivated.
Nemesia strumosa has open mouth-shaped flowers densely clustered in racemes. The brilliant colors are yellow, cream, orange, crimson, rose, and derivations of them.
The nemesia is perhaps as much at home in the rockery as any other garden spot. In cool climates, it is an unexcelled plant for beds but in Central and Southern U. S., where summers are hot and dry it is not characteristic.
The seeds may be sown in the winter if greenhouse space is available; the plants then come into bloom in early spring. They may be cut back and placed in the garden where by gradually hardening-off they may be set as early as April and give a great show of color before many perennials are in bloom. Seeds may be sown in March, in which case the plants bloom later.